Home / 12,015.20-18,001.20-11,237.60

Finding the Fourth Proportional to 12,015.20, 18,001.20 and 11,237.60

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Solution

The fourth proportional to 12,015.20, 18,001.20 and 11,237.60 is: 16,836.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,015.20 : 18,001.20 = 11,237.60 : x
  2. Step 2: Convert to fraction form
    12,015.20/18,001.20 = 11,237.60/x
  3. Step 3: Cross multiply
    12,015.20x = 18,001.20 × 11,237.60
  4. Step 4: Simplify right side
    12,015.20x = 202,290,285.12
  5. Step 5: Solve for x
    x = 202,290,285.12/12,015.20
  6. Step 6: Final answer
    x = 16,836.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.